Current collector



April 22, 1930. J. M. BARR ET AL 1,756,004

CURRENT COLLECTOR originai Filed oct. 12, 1922 Patented Apr. 22, 1930 UNITED STATES meeuw PATENT FFECE JOHN M. BARR, OF CLEVELAND, OHIO, AND HAROLD L. SMITH, OF MILWAUKEE, WIS- CONSIN, ASSIGNORS TO THE LOUIS ALLIS COMPANY, OF MILWAUKEE, WISCONSIN,

A CORPORATION OF WISCONSIN CURRENT COLLECTOR Continuation of application Serial No.

This invention relates to a current collector for dynamo electric machines.

- This application is a continuation of our copending application Serial No. 594,081, iiled October 12, 1922, as to matter common to both applications.

-An object of the invention is to provide a current collector in which the collector rings are firmly held in place during expansion and contraction thereof. n

Another object is to provide a current collector in which the collector ringsare secured upon a shaft or rotor and held in concentric relation thereto by continual resilient pressure.

Another object is to provide a current collector from which heat willbe rapidly dissipated.4 f

Another object isto provide a current collector having Ventilating passages through and between the collector rings.

Another object is to provide a current collector having a relatively small overall diam* eter.

Another object is to provide a current collector from which the collector rings may be readily removed after the collector has been installed upon a dynamo electric machine.

Another object is to provide a current collector which may be readily and economically manufactured.

According to the invention as ordinarily embodied, the collector ring is held firmly in place by a ring support which exertsV continual radial and axial pressure thereon.

The ring support grips the hub at points spaced around the periphery thereof and holds the collector ring concentric therewith.

The collector ring is spaced fromthe hub of the collector by the ring support to provide a Ventilating space therebetween.

Adjacent collector rings are spaced from each other by the ring support to provide a Ventilating space between the rings.

A current collector embodying the invention is shown in the accompanying drawing in which the views areas follows:

Fig. 1 is a central longitudinal section through the current collector.

Fig. 2 is an end view thereof.

594,081, filed October 12, 1922. This application filed ApriI 22, 1929. Serial No. 357,200.

Fig. 3 is a view of the opposite end.

Fig. 4 is an elevation of one of the collector' ring supports 4 to lix the rings in position.

concentric with the hub, means to clamp the rings, ring supports and hub together, and conductors 5 to connect the rings to the rotor windings of the dynamo electric machine.

The hub 1 is adapted to be fixed for rota;V tion with the shaft 2, or other rotating part 'of a dynamo electric machine, and is provided at one end with Aradial arms 6 against which the collector rings are clamped.

Any number of collector rings may be employed and one face of each ringis provided with a beveled surface 7.

Each ring support 4 has a bore 8, to receive the hub 1, and equally spaced radial arms 9 which are provided on one face with beveled surfaces 10 to coact with the beveled surface 7 on the collector ring and hold the ring concentric with the hub 1.

The opposite face of each arm 9 is provided with a shoulder 11 to stiden thearm and to space adjacent rings from each other.

The collector rings 3 are insulated from the shoulders 11 on the supports 4 and the armsV 6 on the hub 1 by insulation 12 and from the beveled surfaces 10 on the supports 4 by insulators 18.

The arms 9 of the ring supports are pro vided with holes 14 through which bolts 15 are passed and threaded into threaded holes 16 in the arms 6 of the hub to clamp the col-- lector rings and the ring supports on tht hub. Y

. The pressure exerted by the bolts 15 clamps the collector rings and ring supports together, forces the end ring against the arms 6 of the hub and, due to the beveled surfaces 7 and 10 being forced together, tends to force the collector rings outwardly awayV from the of the rotor of the machine upon which the hub, thus' continual radial and axial pres sure 1s exerted upon the rings.

" 'diciently The ring supports d are s and resilient to allow the inwardly and caused to grip the the parts ot' the supports bet-"eer are sprung outwardly, thus t. point contact between each rinf the hub and positively centering ring.

The radial pressure exerted by the riif" supports upon the hub assures a three po support for each collector ring even "C tue bore 8 is somewhat larger than the hub 1.

The ring supports i may be di.' tween two of the arms 9 to compensate variations in diameters and to allow the ri e' support to be seated more readily upon' the hub.

The radial pressure exerted by the arms E) placesv the collector rings under tension antV the resiliency of the ring supports #i nr t i this'tension and prevents the ring'. ening when the saine expand du generated by the machine upon lector is installed.

The collector rings are pre interchangeable and provided wardly extending lugs 17, one oi' a threaded hole 18 and the other two larger holes 19.

One of the conductors 5 is threaded. into each hole 18 and connected to the win-flies' in fn collector is installed.

The conductors 5 are of different and the shortest one is threaded hole 18 in the collector rine' nearest the rotor.

The longest conductor o is threaded into the hole 18 in the collector ring tarthe t trein the rotor, passes through the holes ir other rings, and is insulated from 'those .i by an insulating bushing 20, as shown F ig. 1.

The intermediate collector rin is ed to the rotor winding by a con intermediate length which is threa the threaded hole 18 in that ri through the hole 19 in the inside r insulated therefrom by a bushing' shorter than bushing 20.

If the insulations 11 and 12 are conpe lil connsages are provided between adjacent rings and between the rings and the hub, the rings and supports may be readily removed and replaced without detaching the collector Jfrom the machine, and the outside diameter of the collector rings may be small relatively to the diameter of the rotor sha-ft or other rotating' part upon which the collector is mounted.

The current collector herein set forth may be provided with any number of ring-s and modified in various ways without Q ,nartii'ig` from the scopeof the invention as hereafter claimed. Y

The invention is claimed as follows:

1. A current collector comprising av collector ring, and a ring support shaped to hold and support said collector ring in place b v exerting radial and axial. pressure there'- ou and to provide Ventilating spacesbetwecn" trie saine and said collector ring.

2. A current collector comprising collector rings, andv intermediate ring ysupports shaped to hold and support said collector rings in place by exerting radial and axial pressure tween the same and said collector rings.

8. A current collector comprising a collector ring, a ring support shaped to hold and support said collector ring in place by exerting radial and axial pressure thereon and to provide Ventilating spaces between the same andA said collector ring, and means" to clamp said collector ring and said ring support together.

4. A current collector comprising collector rings, intermediate ring supports shaped to hold and support said collector rings in place' by exerting radial and axial pressure thereon and to provide Ventilating spaces betweenV the same and said collector rings, and means to clamp said collector rings and said ring supports together. A

5. A current collector comprising a hub, collector rings surrounding said hub andy spaced therefrom, and ring supports carried by said hub and insulated lfrom said collector' rings to hold the saine in fixedl concentric reation to said hub and allow a circulation or air between said rings and said hub.

6. A. current collector comprising a hub; collector rings surrounding said hub and spaced therefrom, ring supports carried by said hub to hold said collector rings in fixed concentric relation to said hub and allow a circulation et air between adjacent rings and between said rings and said hub, and insulation arranged between said collector rings and said ring supports. y Y

7. A rent collector comprising a hub,

collector' rings surrounding said hub and spaced therefrom, ring supports carried by said hub to hold said collector rings in fixed concentric relation to said hub and allow a circulation of air between said rings and said hub, shoulders carried by said ring supports to space adjacent collector rings from each other and allow a circulation of air therebetween, and insulation arranged between said collector rings and said ring supports.

8. A current collector comprising a hub, collector rings surrounding said hub and spaced therefrom, and ring supports arranged on said hub and shaped to support said collector rings by exerting radial and axial pressure thereon and to provide ventilating space between adjacent collector rings and between said collector rings and said hub.

9. A current collector comprising a hub, collector rings surrounding said hub and spaced therefrom, ring supports carried by said hub and having radial arms to hold said rings in place by exerting a continual radial and axial pressure thereon and to provide air passages between adjacent rings, and means passing through said radial arms to clamp said ring supports and said collectorrings to said hub.

10. A current collector comprising a hub having radial arms at one end thereof, collector rings surrounding said hub and spaced therefrom, ring supports carried by said hub and having radial arms to hold said rings in place by exerting a continual radial and axial pressure thereon, and means passing through the arms of said ring supports and said hub to clamp said ring supports and said collector rings to said hub.

11. A current collector comprising a hub having a fixed flange, a collector ring surrounding said hub and spaced therefrom, a ring support shaped to hold and support said collector ring in place between the same and said flange by exerting radial and axial pressure thereon and to provide Ventilating spaces between the same and saidcollector ring, and means to draw said ring support toward said flange to cause said collector ring to be clamped between the same and said flange.

12. A current collector comprising a hub having a fixed flange, a collector ring surrounding said hub and spaced therefrom, a ring support shaped to hold and support said collector ring in place between the same and said flange by exerting radial and axial pressure thereon and to provide Ventilating spaces between the same and said collector ring, and a bolt connecting said flange and said ring support to cause said collector ring to be clamped between the same.

13. A current collector comprising a hub, a collector ring surrounding said hub and spaced therefrom, a flexible ring support arranged yon said hub to hold said collector ring in place thereon, and means to distort said ring support and cause the same to engage said hub and be fixed thereto.

a collector ring surrounding said hub and kspaced therefrom, a flexible ring support arranged on said hub to hold said collector ring in place thereon, and means to distort said ring support and cause the same to engage said hub at points spaced around the periphery thereof and to be fixed thereto.

16, A current collector comprising a hub, collect-or rings surrounding said hub and having internal beveled surfaces, ring supports arranged on said hub and having radial arms provided with external beveled surfaces to coact with the beveled surfaces on said collector rings, and means to wedge said ring supports between said collector rings and said hub.

17. A current collector comprising a hub, a flange carried by said hub, a ring support arranged on said hub, radial arms carried by said ring support and having beveled sur faces at the outer ends thereof, a collector ring having a beveled surface to coact with the beveled surfaces on said arms, and means to clamp said collector ring between said flange and said ring support.

18. A current collector comprising a hub having arms extending radially from one end thereof, a ring support arranged on said hub and having radial arms provided with beveled surfaces at the outer ends thereof, a collector ring surrounding said hub and having beveled surfaces to coa ct with the beveled surfaces on the arms of said ring support, and means to clamp said collector ring between the arms of said ring support and the arms of said hub and to wedge the arms of said ring supports between said collector rings and said hub.

19. A current collector comprising a hub having' arms extending radially from one end thereof, ring supports arranged on said hub and having radial arms provided with beveled surfaces on the outer ends thereof, collector rings surrounding said hub and having beveled surfaces to coact with the beveled surfaces on the arms of said ring supports, and bolts extending through the arms of said ring supports and threaded into the arms of said hub to clamp said collectorrings, ring supports and hub together.

20. A current collector comprising a hub having arlns extending radially from one endV thereof, ring supports arranged on said hub andhaving radial arms provided. with beveled` surfaces on the outer ends thereof, collector rings Surrounding said huh and having beveled surfaces to eoact With the beveled surfaces on Jche arms of said ring supports, shoulders carried by the arms of said ring e supports to space said collector rings from each other, and bolts extending through the arlnsof said ring supports and threaded into the arms o'f said hub to clamp said collector rings, ring supports andy hub together.k

In Witness whereof, We have hereunto subscribed our names.

JOHN M. BARR.

HAROLD L. SMITH. 

